(3)  
834367-1 Assembly - Electrical Cable, AlliedSignal, Inc.

 (4)  
294110-1 Assembly - Test Cable, AlliedSignal, Inc. (this is an alternative to the 834367-1 Electrical Cable Assembly)

 (5)  
2024498-1 Assembly - Adapter Cable, AlliedSignal, Inc. (this is an alternative to the 834367-1 ELectrical Cable Assembly)

 C. Standard Tools and Equipment
 (1)  
AIRPLANES WITHOUT THE ETC; Wheatstone Bridge - measurement range of 8 ohms (|0.05%), Model 1432U, General Radio Co., W. Concord, MA

 (2)  
AIRPLANES WITH THE ETC; Wheatstone Bridge - measurement range of 8 ohms (|0.05%), No. 4289-2, Leeds and Northrup Co., Sumneytown Pike, North Wales, PA 19454

 (3)  
Multimeter - measurement range of 8 ohms (|0.05%), Model 8012A-01, Fluke, P.O. Box 9090, Everett, WA 98206-9090 (this is an alternative to the wheatstone bridge)

 D. References
 (1)  
AMM 49-11-00/201, APU Power Plant

 (2)  
AMM 49-52-32/401, APU Control Thermostat (Airplanes without the ETC)

 (3)  
AMM 49-52-32/501, APU Control Thermostat (Airplanes without the ETC)

 (4)  
AMM 49-61-71/501, Electronic Temperature Control (Airplanes with the ETC)

 E. Access
 (1)  
Location Zones
 101 Control Cabin, LH
 205 Electronic Compartment
 703 APU Compartment

 (2)  
Access Panels
 1201 Electronic Equipment Access Door
 3804 APU Cowl Door

 F. Procedure
 S 865-102
 (1)  Set the switch and the circuit breaker:
 (a)  Set the APU master switch on the P5 forward overhead panel to the OFF position and attach a DO-NOT-CLOSE tag.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
(b)  Open this circuit breaker and attach a DO-NOT-CLOSE tag: 1) E3-3 Electrical Shelf, APU Control Unit
 S 015-103
 (2)  Open the APU cowl door:
 (a)  
Open the latches for the APU cowl door.

 (b)  
Open the APU cowl door.

 (c)  
Connect the door support rods.

 S 015-104
 CAUTION:_______BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
 (3)  Remove the lower shroud:
 (a)  
Hold the lower shroud and open the shroud latches.

 (b)  
Remove the lower shroud.

 S 485-051
 (4)  Install the turbine engine tester on the engine (Fig. 503):
 (a)  
Disconnect the electrical connector D1252 on the APU harness (47) from the receptacle D452 in the upper shroud.

 (b)  
Connect the electrical cable or test cable assembly (46) to the electrical connector D1252 and the receptacle D452.

 NOTE: The connectors on the electrical cable or test cable
____ assembly are identified by aluminum markers.
 (c)  
AIRPLANES WITHOUT THE ETC; Disconnect the leads of the thermocouple harness from the terminals of the EGT thermocouple probe.

 (d)  
AIRPLANES WITH THE ETC; Disconnect the leads of the thermocouple harness from the studs of the ETC thermocouple probe.

 (e)  
AIRPLANES WITHOUT THE ETC; Connect the leads of the electrical cable or adapter cable assembly (46) to the terminals of the EGT thermocouple probe.

 NOTE: If the adapter cable assembly is used, the test cable
____ assembly must be connected to the adapter cable assembly.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
(f)  AIRPLANES WITH THE ETC; Connect the leads of the electrical cable or adapter cable assembly ( 46) to the studs of the ETC thermocouple probe.
　
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